Patent application number | Description | Published |
20090007546 | Exhaust Gas Purifying Apparatus for an Internal Combustion Engine and a Method for Controlling Same Apparatus - An exhaust gas purifying system for an internal combustion engine includes a first exhaust passage ( | 01-08-2009 |
20090178392 | Exhaust Gas Purification System for Internal Combustion Engine and Method for Regenerating Purification Ability of Exhaust gas Purification Device - The problem is to regenerate the purification ability of an exhaust gas purification device more reliably or efficiently in an exhaust gas purification system that combines a plurality of branch passages branch off from an exhaust gas passage and exhaust gas purification devices. When the purification ability of an exhaust gas purification device is regenerated, in the branch passage where the exhaust gas purification device is provided whose purification ability is to be regenerated, the opening angle of an exhaust gas flow volume control valve is set to the minimum opening angle that can reliably transport a reducing agent that is added from a reducing agent addition section. While the opening angle is maintained, the reducing agent is added. After the addition of the reducing agent is complete, the opening angle of an exhaust gas flow volume control valve is closed completely. | 07-16-2009 |
20090205323 | Exhaust Gas Purification System For Internal Combustion Engine - An object of the invention is to provide a technique for improving the efficiency of performance regeneration process that is executed on NOx storage reduction catalysts provided in a plurality of branch passages branching from the exhaust passage and reduce emissions of NOx from an internal combustion engine to the atmosphere. When the quantity of NOx discharged from an internal combustion engine and flowing into an exhaust pipe is smaller than a predetermined quantity, fuel serving as reducing agent is added through a fuel addition valve while torque change moderating process is executed (from T | 08-20-2009 |
20090293465 | POWER SOURCE SYSTEM OF INTERNAL COMBUSTION ENGINE - Provided is a technology enabling a temperature of an exhaust gas purifying device to rise more surely by operating an electric heater for a catalyst attached with the electric heater more steadily without exerting an excessive load on a battery. Included are the battery and the electric heater operating upon being supplied with electric power from the battery and heating an occlusion-reduction type NOx catalyst, wherein it is predicted, from a point that a SOx occluded quantity into the occlusion-reduction type NOx catalyst is equal to or larger than S | 12-03-2009 |
20090301059 | EXHAUST PURIFICATION DEVICE OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, an NO | 12-10-2009 |
20100031642 | EXHAUST PURIFICATION DEVICE OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, a urea adsorption type selective reduction catalyst is arranged in an engine exhaust passage. By feeding urea from a urea feed valve into the exhaust gas flowing into this selective reduction catalyst, the NOx included in the exhaust gas is reduced in the selective reduction catalyst. TO suppress the generation of hydrogen cyanide, an HC adsorption catalyst for adsorption of the HC in the exhaust gas is arranged in the engine exhaust passage upstream of the selective reduction catalyst. | 02-11-2010 |
20100037596 | EXHAUST PURIFICATION DEVICE OF COMPRESSION IGNITION TYPE INTERNAL COMBUSTION ENGINE - In an internal combustion engine, an NO | 02-18-2010 |
20100037599 | Exhaust purification device of internal combustion engine - In an internal combustion engine, an NO | 02-18-2010 |
20100043405 | Exhaust purification device of an internal combustion engine - In an internal combustion engine, an NO | 02-25-2010 |
20100050610 | EXHAUST GAS PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - A catalyst suitable for reducing NOx in exhaust gas by ammonia in the presence of excess oxygen is arranged in an engine exhaust passage. The catalyst is fed an aqueous urea solution from an addition control valve, part of the urea fed to the catalyst is stored in the catalyst, and the ammonia produced from the urea stored in the catalyst is used to reduce the NOx in the exhaust gas. It is judged whether the storage capacity of the catalyst is larger than a preset allowable upper limit capacity. When it is judged that the storage capacity of the catalyst is larger than the allowable upper limit capacity, the feed of the aqueous urea solution is prohibited. | 03-04-2010 |
20100058741 | EXHAUST PURIFICATION DEVICE OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, an NO | 03-11-2010 |
20100111774 | EXHAUST GAS PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - An object of the present invention is to suppress, in a system in which an NOx selective catalytic reduction catalyst and a particulate filter are provided in an exhaust passage of an internal combustion engine, discharge of ammonia from the NOx selective catalytic reduction catalyst. In the exhaust gas purification system for an internal combustion engine according to the present invention, when a condition for executing a filter temperature raising control is satisfied, the supply of urea to the NOx selective catalytic reduction catalyst by urea supply means is stopped, and the filter temperature raising control is executed by filter temperature raising means after a specific time has elapsed since the time of stoppage of the supply of urea to the NOx selective catalytic reduction catalyst. | 05-06-2010 |
20100146945 | Exhaust Purification System for Internal Combustion Engine - The present invention provides a technology enabling regeneration of the purification performance of an exhaust purification device more reliably and more efficiently in an exhaust purification system combining a plurality of branch passages bifurcating from an exhaust passage and an exhaust purification device provided in each branch passage. When regenerating the purification performance of a first exhaust purification device provided in a first branch passage, a second valve provided in a second branch passage is set at a predetermined first intermediate opening and a first valve provided in the first branch passage is fully closed. Fuel is then added from a first fuel addition valve provided in the first branch passage. | 06-17-2010 |
20100281853 | METHOD OF ESTIMATING QUANTITY OF N2O PRODUCED IN AMMONIA OXIDATION CATALYST AND EXHAUST GAS PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - An object of the invention is to estimate the quantity of N | 11-11-2010 |
20110047993 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an exhaust purification system of an internal combustion, comprising a NO | 03-03-2011 |
20110056188 | EXHAUST PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - The present invention provides an exhaust purification apparatus for an internal combustion engine which enables a decrease in NOx purification rate and possible ammonia slip to be inhibited. The apparatus includes an NOx catalyst, a urea aqueous solution addition valve serving as reducing agent adding means, and NOx sensors provided an inlet and an outlet of the NOx catalyst, respectively. When the bed temperature of the NOx catalyst is in a predetermined high-temperature region in which the amount of ammonia converted into NOx increases relatively and an NOx purification rate decreases relatively, the apparatus uses outputs from the NOx sensors to perform correction such that the actual addition amount of the urea aqueous solution addition valve reaches a target addition amount. | 03-10-2011 |
20110083427 | EXHAUST PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - The present invention provides an internal combustion engine exhaust purification apparatus includes a filter configured to collect particulate matter contained in exhaust gas, a selective catalytic reduction converter provided downstream of the filter to reduce nitrogen oxide contained, an oxidation catalyst converter with an adsorption function provided upstream of the converter to temporarily adsorb the nitrogen oxide contained in the exhaust gas, a burner configured to increase the temperature of the exhaust gas flowing into the filter, the selective catalytic reduction converter, and the oxidation catalyst converter to set the temperature of the filter to at least a predetermined recovery temperature, thus recovering the filter, and an ECU configured to inhibit the burner from being started when the burner is otherwise to be started but if the selective catalytic reduction converter has not been activated. | 04-14-2011 |
20110083429 | CATALYST PASSING COMPONENT DETERMINING APPARATUS AND EXHAUST PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - The present invention comprises a selective reduction type NOx catalyst located in an exhaust passage and being capable of purifying NOx with ammonia, an oxidation catalyst located downstream of the selective reduction type NOx catalyst, an upstream sensor located between the selective reduction type NOx catalyst and the oxidation catalyst and having ability to detect both ammonia and NOx, a downstream sensor located downstream of the oxidation catalyst and having ability to detect both ammonia and NOx, and determining means for determining a component passing through the selective reduction type NOx catalyst, based upon a relation between output of the upstream sensor and output of the downstream sensor. | 04-14-2011 |
20110271663 | EXHAUST PURIFYING DEVICE FOR INTERNAL COMBUSTION ENGINES - An exhaust purifying device for an internal combustion engine which can restrict an influence of a measurement error in a NOx sensor provided at the downstream side of a catalyst and can optimally maintain a NOx purifying rate. The device includes a catalytic converter carrying a selective catalytic reduction catalyst provided in an exhaust passage of the engine to selectively reduce nitrogen oxides, a urea water adding valve for adding urea water to the catalyst as a reducing agent, a NOx sensor provided at the downstream side of the catalyst, and an ECU for adjusting an addition amount of the urea water adding valve based upon output of the NOx sensor, wherein a urea water addition amount adjusting process is executed under a condition that a NOx amount to be generated in the engine increases. | 11-10-2011 |
20120240557 | EXHAUST GAS PURIFICATION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE - An exhaust gas purification system for an internal combustion engine, which is provided with: a selective reduction type catalyst arranged in an exhaust passage of the internal combustion engine; a low pressure EGR mechanism that is equipped with a low pressure EGR passage for introducing a part of an exhaust gas flowing through a portion of the exhaust passage downstream of a turbine of a centrifugal supercharger to a portion of an intake passage upstream of a compressor as a low pressure EGR gas, and a low pressure EGR valve for changing a channel cross section of the low pressure EGR passage; a supply device. | 09-27-2012 |